Alert archive / Minnesota / Tornado Warnings in 1991

Tornado Warning 8, NWS Twin Cities, MN

July 5, 1991Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 5, 1991, 8:15 PM CDT for Mille Lacs County, Minnesota. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 5, 1991, 8:15 PM CDT (01:15 UTC)
Expired
Jul 5, 1991, 9:00 PM CDT
In force
45 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Mille Lacs County, MN

What was reported inside it

TimeReportWhereRemark
Jul 5, 8:37 PM CDTTornado F0Mille Lacs, MN
Jul 5, 8:55 PM CDTThunderstorm Wind 0Mille Lacs, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.3 hours before the alert went out and 294 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 1991-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 785 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 1991-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
785 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTC 060115
TORSTC
MNC095-060200-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
815 PM CDT FRI JUL 5 1991
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA   HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  900 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MINNESOTA
 
   ...NORTHERN MILLE LACS COUNTY
 
AT 8 15 PM CDT A THUNDERSTORM WITH A POSSIBLE TORNADO WAS LOCATED 15
MILES EAST OF BRAINERD MINNESOTA NEAR THE CITY OF GARRISON ON MILLE
LACS LAKE. THIS THUNDERSTORM WAS MOVING EAST SOUTHEAST AT 30 MPH.
 
BOATERS SHOULD MOVE OFF MILLE LACS LAKE IMMEDIATELY. TOWNS IN THE PATH
OF THIS TORNADO ARE ONAMIA AND WAUKON. SEEK SAFE INSIDE SHELTER.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
NNNN

Nearby

Tornado Warnings in Minnesota, 1991Every tornado warning in 1991Tornadoes in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.